Please change the mission selection system. There are too many layers of RNG even to select a mission.
If you are trying to copy Deep Rock Galactic you need to understand what made it work, because all this current system does is file off the serial numbers and then remove almost all player agency in what they can select.
The Mission select should be split into your zones, with all missions and difficulties selectable. Secondaries would be dependent on missions, conditions should be dependent on zone. Maybe rotate the zones if you want to create an illusion of an active battlezone. The reason DRG’s mission select works is that it still gives people a lot more control over what they play than this current mission selection system in DT.